package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;

    /**
     * 新增菜品和口味
     *
     * @param dishDTO
     */
    @Override
    public void saveWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        // 向菜品表插入 一条 数据
        dishMapper.insert(dish);

        // 向口味表插入多条数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        // 获取到刚插入菜品表的主键值 <insert id="insert" useGeneratedKeys="true" keyProperty="id">
        long dishId = dish.getId();
        if (flavors != null && flavors.size() > 0) {
            flavors.forEach(dishFlavor -> {
                // 设置菜品id
                dishFlavor.setDishId(dishId);
            });
            // 批量插入
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    /**
     * 菜品分页查询
     *
     * @param dishPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        log.info("菜品分页查询：{}", dishPageQueryDTO);
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());
        Page<Dish> page = dishMapper.pageQuery();
        log.info("菜品分页查询结果：{}", page);
        return new PageResult(page.getTotal(), page.getResult());
    }

    @Override
    public void delete(List<Long> ids) {
        // 判断当前菜品是否能够删除--是否存在起售中的菜品
        for (Long id : ids) {
            Dish dish = dishMapper.getById(id);
            if (dish.getStatus() == StatusConstant.ENABLE) {
                log.info("菜品正在售卖中，不能删除");
                throw new RuntimeException(MessageConstant.DISH_ON_SALE);
            }
        }

        // 判断当前菜品是否能够删除--是否被套餐关联了
        List<Long> setmealIds = setmealDishMapper.countByDishId(ids);
        if (setmealIds != null && setmealIds.size() > 0) {
            log.info("当前菜品被套餐关联，不能删除");
            throw new RuntimeException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
/*        for (Long id : ids) {
            int count = dishMapper.countByDishId(id);
            if (count > 0) {
                log.info("当前菜品被套餐关联，不能删除");
                throw new RuntimeException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
            }
        }*/

        // 删除菜品表中的菜品数据
        for (Long id : ids) {
            dishMapper.deleteById(id);
        // 删除菜品和口味的关联数据
            dishFlavorMapper.deleteByDishId(id);
        }

    }

    /**
     * 根据id查询菜品和对应的口味
     *
     * @param id
     * @return
     */
    @Override
    public DishVO getByIdwithFlavor(Long id) {
        // 1.根据id查询菜品数据
        Dish dish = dishMapper.getById(id);

        // 2.根据菜品id查询口味数据
        List<DishFlavor> flavors = dishFlavorMapper.getByDishId(id);

        // 3.将查询到的数据封装到VO中
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish, dishVO);
        dishVO.setFlavors(flavors);
        return dishVO;

    }

    /**
     * 根据id修改菜品和对应的口味
     *
     * @param dishDTO
     */
    @Override
    public void getByIdWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        // 修改菜品表基本数据
        dishMapper.update(dish);
        // 删除原有的口味数据
        dishFlavorMapper.deleteByDishId(dishDTO.getId());
        // 重新插入口味数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });
            // 向口味表插入n条数据
            dishFlavorMapper.insertBatch(flavors);
        }
    }

}
